Nike Zonal Cooling Relay Long Sleeve Running Top Smooth flatlock seams Reflective details for low light conditions Breathable engineered mesh zones Keep up the pace with Nike's Zonal Cooling Relay Long Sleeve Running Top. Engineered to keep you cool and comfortable when the running heats up with zoned cooling that increases airflow and breathable engineered mesh zones. The reflective details enhance visibility in low-light conditions, durable back neck tape and flatlock seams that move smoothly against your skin.